144 POMPECKJ. JURASSIC FAUNA OF CAPE FLORA, [norw. pol. exp. 



designating the genera Cadoceras and Quenstedtoceras, allied to Macrocepha- 

 lites, as specifically northern. The group of the Belemnites excentrici (Neu- 

 mayr) also, to which our Bel. m. f. subextensus Nik. — Panderi d'Orb. be- 

 longs, may, from its genealogy, be traced back to Western European forms, 

 and must not be regarded as having originated in arctic regions. 



Thus we see that from the fragments of the northern Bajocian and Gal- 

 lovian faunas now before us, we cannot yet come to any conclusion as to 

 the continuity of the marine fauna of the Cape Flora region from the Bajo- 

 cian to the Callovian. 



As far as we can tell from our knowledge of the geology of Spitzbergen 

 and Franz Josef Land, these regions were exposed to repeated and very con- 

 siderable oscillations of sea-level in the mesozoic period. 



Owing to an upheaval of the land before the Callovian period, the posi- 

 tion of the Bajocian sea was possibly moved from the region of Cape Flora 

 and south Franz Josef Land, to the north and west. By a subsequent sinking 

 of the land in the Callovian period, this region was again inundated, this time 

 by the Russian Callovian sea^ moving hither from the south. (The connec- 

 tion of the Russian Jura sea with the polar sea in which the genus Aucella 

 developed, would thus be deferred to the Oxfordian period.) 



It is natural that every new occurrence of marine Jura, particularly in 

 regions with an exposed geographical situation, should be examined, in order 

 to find out how it stands in relation to Neumayr's theory of the climatic 

 zones in the Jurassic period. In the discussion following the reading of New- 

 ton and Teall's work on Franz Josef Land, before the Geological Society of 

 London, Mr. J. W. Gregory pronounced Neumayr's theory to be „now quite 

 untenable". Impossible as I find it to regard Neumayr's theory as correct 

 and proved, I cannot pass the severe judgement of Gregory upon it, simply 

 on the ground of the Jura of Franz Josef Land, 



The little we know of the fauna of the Bajocian of Cape Flora certainly 

 challenges a comparison of it with the fauna of Central Europe. The forms 

 are, however, too indistinct, and the number of known species is as yet far 

 too small to allow of our bringing forward any definite proofs either for or 



1 This would also explain the difference from the fauna of the Callovian of Cape 

 Stewart in East Greenland, which has branched off in other directions — and probably 

 also under other bionomic conditions — from west-central Europe. 



